Guest VM disk write slow

M

Martin Ezequiel

New Member
Jan 29, 2015
9
0
1
Ciudad de Córdoba, Argentina
Hi Guys


I have problems any guest both windows or linux, for example in windows server 2008, I copy any folder and paste any destination, transfer rate between 350 kb/s to 1.5/3 mb/s no much! :(


I think the transfer normally between 10 Mb/s to 60 Mb/s aproximate


My virtual hard drives is from VmWare transfered to proxmox.


I created new vm on web, but i transfered disks via Win Scp in /var/lib/vz/imaves/xxx


But in vmware, the speed transfer is very fast and not have problems.


How resolve this slow writing? I have server IBM x3100 M4 with 1 tb hard drive.


Thanks.


Best Regards.
 
This is the result

root@teleprom:~# pveperf /var/lib/vz
CPU BOGOMIPS: 24744.44
REGEX/SECOND: 1406815
HD SIZE: 802.23 GB (/dev/mapper/pve-data)
BUFFERED READS: 137.27 MB/sec
AVERAGE SEEK TIME: 21.46 ms
FSYNCS/SECOND: 207.60
DNS EXT: 614.50 ms
DNS INT: 528.50 ms (com)

I send 3 tries to test. Same results.
 
and config is

bootdisk: ide0
cores: 4
cpu: host
ide0: local:100/vm-100-disk-1.vmdk,format=vmdk, size=40G
ide2: none,media=cdrom
memory: 2048
name: Jacinto
net0: e1000=6A:26:69:85:F4:36,bridge=vmbr0
ostype: win8
smbios1: uuid=357e1a17-e5c3-4528-b472-6d0e3aef2e43
sockets: 1
 
You have to change IDE to Virtio in order to achieve max performance

Follow the following guide:

1. Shutdown VM
2. Add new VirtIO HDD to your server (like a 1gb hdd)
3. Start VM
4. Use the virtio drivers for scsi controllers (install drivers from: http://www.linux-kvm.org/page/WindowsGuestDrivers/Download_Drivers)
5. Shutdown VM
6. Delete new harddisk
7. Change in you config IDE to VirtIO (for initial disk)
8. Start VM again
 
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